https://filter-everything.com/products/replacement-aluminum-pre-post-filter-12-1-2-x-20-x-5-16-compatible-with-trion-air-cleaner-models-20-x-25-models-used-in-he2000-max5-2-pack
Replacement Aluminum Pre/Post Filter- 123324-004 12-1/2 X 20 X 5/16 - Compatible with Trion Air...
This aluminum replacement air cleaner filter is compatible with Trion Air Cleaner models: 123324-004 20" X 25" MODELS USED IN He2000, MAX5-. Dimensions measure...